Convert a linked list to a string

Convert a linked list to a stringCodewars

Solution

JavaScript

class Node {
  constructor(data, next = null) {
    this.data = data;
    this.next = next;
  }
}

const stringify = (list, data = []) => {
  return list ? stringify(list.next, [...data, list.data]) : [...data, 'null'].join(' -> ');
};